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33x26cm algae scrubber using 10w LED flood

Here is my scrubber after 1 week and 1 clean.I have been using 2x10w LED flood lights warm white colour 2700k to 3000k.I was using a eheim compact 1000 pump but after advice from this site i have upgraded to a rio 2100 pump

Your screen is roughly 133". How many cubes of food are you feeding? If its not near 10 cubes a day you will not see any type of green growth at all. If you are feeding only 2-3 cubes you should cut your screen down to about 5x5in or 6x6in and then you will have great growth with the right light source.
The next issue (maybe issue) is the LED's you have will grow algae but I am not sure how effective as I am not sure of anyone testing this spectrum. It will grow algae for sure, though I am not sure how much. Maybe you will be the one to tell us!! Perhaps someone else has info on this LED's growth.
You look to have great flow but your screen might be a little over sized.